Staff Selection Commission Multi Tasking Staff Exam
Question : A radioactive substance does not undergo any change (in mass or charge) during
Option 1: gamma emission
Option 2: oxidation
Option 3: alpha emission
Option 4: beta emission
Correct Answer: gamma emission
Solution : The correct answer is gamma emission.
Gamma rays do not have mass or charge. Gamma radiation is a type of ionising radiation with a very high energy. Gamma rays are pure electromagnetic energy with no mass or electrical charge. These rays move at
Question : Identify the segment that contains a grammatical error. If there is no error, select 'No Error'.
The differences were / imperceptible to all but / the most trained eye.
Option 1: imperceptible to all but
Option 2: No Error
Option 3: the most trained eye.
Option 4: The differences were
Correct Answer: No Error
Solution : The correct choice is the second option.
Explanation:
The sentence is grammatically correct. The sentence effectively communicates that the differences were extremely subtle and that only someone highly trained or observant would be able to perceive them without any grammatical errors.
Therefore, the correct
Question : Select the most appropriate option to fill in the blank.
The pirates will try to _____________the gold ornaments.
Option 1: cease
Option 2: seize
Option 3: slice
Option 4: steel
Correct Answer: seize
Seize means to take hold of forcibly or with authority, which fits the context of the pirates taking the gold ornaments. In this context, seize is the correct choice, indicating the pirates' intention to forcibly take possession
Question : Who discovered that Malaria was caused by female Anopheles?
Option 1: Edward Jenner
Option 2: Louis Pasteur
Option 3: Robert Koch
Option 4: Ronald Ross
Correct Answer: Ronald Ross
Solution : The correct option is Ronal Ross.
In 1897, Sir Ronald Ross identified the Anopheles mosquito as a malaria vector. He was awarded the Nobel Prize in Physiology or Medicine in 1902. The parasite plasmodium, which causes malaria, is transmitted to people by mosquito bites.
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? –7, – 6, – 4, – 1, 3, 8, 14, ?
Option 1: 26
Option 2: 21
Option 3: 24
Option 4: 18
Correct Answer: 21
Solution : Given: – 7, – 6, – 4, – 1, 3, 8, 14, ?
In the above-given series, add consecutive natural numbers to the previous number to get the next number. – 7 + 1 = – 6, – 6 + 2 = – 4, –
Question : Find the HCF of $\frac{11}{25}, \frac{9}{20}, \frac{16}{15}$, and $\frac{10}{33}$.
Option 1: $\frac{1}{3300}$
Option 2: $\frac{1}{330}$
Option 3: $\frac{1}{33}$
Option 4: $\frac{1}{300}$
Correct Answer: $\frac{1}{3300}$
Solution : The highest common factor (HCF) of fractions is calculated as the HCF of the numerators divided by the least common multiple (LCM) of the denominators. The numerators of the given fractions are 11, 9, 16, and 10. The HCF of these numbers is 1. The
Question : Which freedom fighter is also known as the ‘Grand Old Man of India’?
Option 1: Chakravarti Rajagopalachari
Option 2: Dr. Zakir Hussain
Option 3: Dadabhai Naoroji
Option 4: Mahatma Gandhi
Correct Answer: Dadabhai Naoroji
Solution : The correct answer is Dadabhai Naoroji
Dadabhai Naoroji is often referred to as the 'Grand Old Man of India.' He was a prominent Indian political leader, scholar, and social reformer who played a key role in the Indian independence movement. He is also remembered
Question : Smut of wheat is caused by:
Option 1: Ustilago maydis
Option 2: Puccinia graminis
Option 3: Ustilago tritici
Option 4: Colletotrichum falcatum
Correct Answer: Ustilago tritici
Solution : The correct option is Ustilago tritici.
Wheat smut disease is caused by a fungus from the genus Ustilago. Ustilago tritici and Ustilago nuda are two prevalent species of smut fungus that infect wheat. These fungi are responsible for the production of black smut
Question : Select the correctly spelt word.
Option 1: Milennia
Option 2: Monothistic
Option 3: Hypothesis
Option 4: Prihistoric
Correct Answer: Hypothesis
Solution : The correct choice is the third option.
The word hypothesis refers to a proposed explanation or theory that is based on limited evidence and requires further testing. The word hypothesis is correctly spelt according to the dictionary.
Question : Directions: Select the letter-cluster from among the given options that can replace the question mark (?) in the following series. AY, BX, ?, DV, EU, FT
Option 1: CV
Option 2: CW
Option 3: CE
Option 4: CU
Correct Answer: CW
Solution : Given: AY, BX, ?, DV, EU, FT
Add 1 in the first letter and subtract 1 in the second letter, to obtain the required missing term – AY → A + 1 = B, Y – 1 = X → BX BX → B +
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